Oscillating engine.



No. 674,347. Patented May I4, 190|.

F. WHITMAN.

OSCILLATING ENGINE.

(Application med .rune 11, 1900.)

(No Model.)

un pl lamrlll" will e 5 6 fizvenog" L 756? UNITED l STATES PATENTOFFICE.

FRANK WHITMAN, OF YPSILANTI, MICHIGAN, LASSIGrNOR OF ONE-HALF TO FRANKA. WORDEN, OF SAME PLACE.

osclLLM-l Ncy ENGINE.

SPECIFICATION forming part of Letters Patent No. 674,347,l dated May 14,1901;

Application filed June 11, 190. SerialNo. 19,917. lNo model.) l

To all whom t may cov/cern:

Beit known that I, FRANK WHITMAN,a citiin the peculiar construction,arrangement,

w, Fig. l; and Figs. land 5 are perspectiveviews of some of the partsdetached.

A is the cylinder of the engine, which is provided centrally on oppositesides thereof with trunnions B, journaled in the standards C, preferablyin roller-bearings D therein. Through these opposite trunnions areformed, respectively, the steam and exhaust passages E and F, whichconnect with passages G and H, extending through the walls of thecylinder to opposite ends thereof.

I and J are the ,cylinder-heads, each of which is provided with atransversely-arranged cylindrical casing .K, containing a rocker-valveL.V The passages Gr and H are connected with the casings K by channels Mand` M', formed in the cylinder-heads, connecting with ports N and N inthe casings.

-O represents ports leading from the casings into the cylinder.

The valves L are adapted to cover the ports O and N', and each isprovided with a central channel P, adapted in one position of the valveto connect said ports O and N.

Q represents stems for rocking the valves, which pass out of the casingsK through suitable packing-glands.

Around one of the trunnion-bearings D are secured the segmental racks Rand R'. These are preferably secured in position free to have `a limitedrotary movement on 4the bearing by a ring S, which embraces thelaterally-extending segmental .flanges a on each of the racks.

The racks are of such a` length as to leave a space between their endswhich will permit of 5 5 their being rocked through a limited angle.

T and T are links pivotally connected to the racks R R', respectively,and connected at their opposite ,ends to a head or operatinghandle U,lwhich is adjustably secured upon 6o a stem V by means of a set-screw V.

W represents gear-segments secured to the valvestems Q and meshing withthe segmental racks R and R.

, X is the piston in the cylinder, having a pis- 5 Aton-rod X', which isdirectly connected to the crank, (not shown,) as usual in oscillatingengines.

Inoperation steam is admitted through a suitable inlet-pipe hav-ing aswivel connec- 7o vtionwwith the trunnion B into the passage E,

from which it passes through the passage G," channels M, and ports Ninto the casings K yat opposite ends of the cylinder. Here it iscontrolled by the valves L, which are so set 7 5y that when the. racks RR are in the position shownin full lines, Fig.v8, theengine will bedriven in one direction, steam being admitted through the yports O when,uncovered by the valve andexhausted through said ports, the 8o'channels P, port N', channel M', and passages Hand F. When the racks aremoved into the position shown in dotted` lines, Fig. 3, which may beaccomplished by unfasten-ing the set-screw V' and moving down the head85 U on the stem V, the valves L will be rocked into a'position to drivethe engine inthe opposite direction.

A point of advantage in my construction is that the clearancesarereduced to a mini- 9o mum, the valves L being located'directly on thecylinder-heads, having only the small ports O between them and thecylinder-space.

A further advantage is obtained from the peculiar construction ofreversing mechanism which, while simple in construction, is easilyoperated and not liable to get out of order. What I claim as myinvention is'- 1. In an oscillating engine, rock cut-o valves located onthe opposite heads of the roo cylinder, gear-segments on the stems ofsaid valves and a stationary segmental rack with which saidgear-segments mesh.

2. In an oscillating engine, the combination with the cylinder having atrunnion and a stationary hearing in Which said trunnion is journaled,of rock out-off valves at the opposite ends of said cylinder,gear-segments on the stem of said valves, segmental racks with whichsaid gear-segments mesh journaled on said trunnion-bearings,and meansfor moving said racksegments oppositely to reverse the Valves.

3. In an oscillating engine, the Combination With the cylinder having atrunnion, a stationarg7 bearing in which said trunnion is journaled androok eut-olf valves at opposite ends of said cylinder, havinggear-segments on their stems, of the segmental racks R and R having thelaterally-extending anges d, the ring S for securing said racks on thetrunnion-hearing in mesh with said gear-segments, the links T and Tsecured to said racks and the adjustable head U to which said linksareeonnected substantially as and for the purpose described.

In testimony whereof I affix my signature in presence of two Witnesses.

FRANK WHITMAN. Witnesses:

J. WILLARD BABBITT, JOHN P. KIRK.

